Heat strengthened glass

Details Heat strengthened glass Heat strengthened glass

1987-06-26

1988-07-26

Kellogg, Arthur

Glass manufacturing

Processes

Glass preform treating

65104, 65245, 65253, 65273, 65348, 291211, 291214, 29124, 29127, C03B 2704

Patent

active

047597887

ABSTRACT:
A method of producing heat strengthened glass in which the glass is heated to a temperature above its strain point and is then cooled while horizontally supported. Discontinuous support is provided for the glass as it is cooled by intermittent regional contact with the lower surface of the glass, whereby any pattern of iridescence resulting from heat transfer between the lower glass surface and the support is free of prominent continuous features. A glass treatment furnace for producing heat strengthened glass, has horizontal glass-supporting rollers and cooling-flow supply means in the vicinity of those rollers, the bearing surface of each roller comprising discontinuous bearing elements which provide intermittent regional support contact with the lower surface of the glass.

REFERENCES:
patent: 2725974 (1955-12-01), Shields
patent: 3396000 (1968-08-01), Carson et al.
patent: 3963469 (1976-06-01), Pierre
patent: 4226608 (1980-10-01), McKelvey
patent: 4363163 (1982-12-01), McMaster

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